Question

Calculate the mass of 20%(by mass)K2CO3

Answer 1

Answer:mass of solute= 20gm

mass of solution =100gm=0.1ltr

molar mass of K2Co3 =39*2+12+48=138

moles of solute= 20/138

molarity  = moles of solute *1000/volume of solution in litre 

              = (20/138)/0.1

              = 1.44M